Clive Eric Cussler was an American adventure novelist and underwater explorer. His thriller novels, many featuring the character Dirk Pitt, have reached The New York Times fiction best-seller list more than 20 times. Cussler was the founder and chairman of the National Underwater and Marine Agency (NUMA), which has discovered more than 60 shipwreck sites and numerous other notable underwater wrecks. He is the sole author or lead author of more than 80 books.